Stratigraphic range: Mid Albian-Campanian
|Region||Arizona, Colorado, New Mexico, Utah, Wyoming|
|Extent||Basin and Range, Colorado Plateau & San Juan Mountains Provinces|
|Named for||Mancos, Colorado|
It is dominated by mudrock that accumulated in offshore and marine environments of the Cretaceous North American Inland Sea. The Mancos was deposited during the Cenomanian (locally Albian) through Campanian ages, approximately from 95 Ma to 80 Ma.
The Mancos Shale rests conformably on the Dakota and in its upper part grades into and intertongues with the Mesaverde Group. The shale tongues typically have sharp basal contacts and gradational upper contacts.
The classification broadly corresponds with the Colorado Group classification of the Great Plains region; as such, various units of the Colorado Group are recognized within the Mancos in those areas where their distinct facies can be recognized.
- List of fossiliferous stratigraphic units in Arizona
- List of fossiliferous stratigraphic units in Colorado
- List of fossiliferous stratigraphic units in New Mexico
- List of fossiliferous stratigraphic units in Utah
- List of fossiliferous stratigraphic units in Wyoming
- Cross, W. and Purington, C. W. (1899) "Description of the Telluride quadrangle, Colorado" United States Geological Survey Atlas, Folio 57
- Weimar, R.J. (1960). "Upper Cretaceous Stratigraphy, Rocky Mountain Area". AAPG Bulletin. 44: 1-20. doi:10.1306/0BDA5F6F-16BD-11D7-8645000102C1865D.
- Charlse H. Rankin. "Stratigraphy of the Colorado Group, Upper Cretaceous, in Northern New Mexico" (PDF). New Mexico Bureau of Mines and Mineral Resources Bulletins. New Mexico School of Mines (20): 5. Retrieved 2018-08-13.
...that all divisions of the Colorado group (Mancos shale) as described in southern Colorado, except the Fort Hays limestone and the Apishapa shale, can be recognized in northern New Mexico.
- "Colorado River Basin Stratigraphy: Mancos Shale" United States Geological Survey
- New Mexico Geological Association.edu: "SURFACE and SUBSURFACE STRATIGRAPHY of the BURRO CANYON FORMATION, DAKOTA SANDSTONE, and INTERTONGUED MANCOS SHALE of the CHAMA BASIN, NEW MEXICO"; 2005.
- R. Mark Leckie, James I. Kirkland, and William P. Elder (1997). "Stratigraphic Framework and Correlation of a Principle Reference Section of the Mancos Shale (Upper Cretaceous), Mesa Verde, Colorado" (PDF). 48th Annual NMGS Fall Field Conference Guidebook. Mesozoic Geology and Paleontology of the Four Corners Area: 288. Retrieved 2018-08-04.CS1 maint: uses authors parameter (link)
- Russell K. Lewis, Stratigraphy and depositional environments of the Late Cretaceous (Late Turonian) Codell sandstone and Juana Lopez members of the Carlile shale, southeast Colorado (PDF), 2013 - Mines Theses & Dissertations, retrieved 2018-08-14